Add polonius repository under automation

[Kobzol]

Repo: https://github.com/rust-lang/polonius

Extracted from GH:

org = "rust-lang"
name = "polonius"
description = "Defines the Rust borrow checker."
bots = []

[access.teams]
security = "pull"
wg-polonius = "write"
compiler = "admin"
core = "admin"

[access.individuals]
rust-lang-owner = "admin"
lqd = "write"
rylev = "admin"
cjgillot = "admin"
oli-obk = "admin"
badboy = "admin"
Aaron1011 = "admin"
nikomatsakis = "write"
pietroalbini = "admin"
Mark-Simulacrum = "admin"
petrochenkov = "admin"
ecstatic-morse = "write"
lcnr = "admin"
pnkfelix = "admin"
jackh726 = "admin"
davidtwco = "admin"
estebank = "admin"
jdno = "admin"
compiler-errors = "admin"
amandasystems = "write"
wesleywiser = "admin"
michaelwoerister = "admin"
eddyb = "admin"
nagisa = "admin"
matthewjasper = "admin"